/*
  将下面异步代码使用 Promise 的方法改进
  尽量用看上去像同步代码的方式
  setTimeout(function () {
    var a = 'hello'
    setTimeout(function () {
      var b = 'lagou'
      setTimeout(function () {
        var c = 'I ♥ U'
        console.log(a + b +c)
      }, 10)
    }, 10)
  }, 10)
*/

function getWords(word,time){
    return new Promise((resolve,reject)=>{
        setTimeout(()=>{
            resolve(word+" ");
        },time)
    })
}

async function Express(){
    const a = await getWords("hello",10);
    const b = await getWords("lagou",10);
    const c = await getWords("I ♥ U",10);
    console.log(a + b + c)
}
Express()